tag:blogger.com,1999:blog-15284629187610683482011-07-30T20:50:36.114-07:00Agen Propolisnoreply@blogger.comBlogger11100tag:blogger.com,1999:blog-1528462918761068348.post-77709223528334462102009-06-04T12:01:00.000-07:002009-06-04T12:25:32.707-07:00<p><strong><span style="font-size:130%;">Tumours </span></strong><br />- astrocytoma<br />- medulloblastoma<br />- craniopharyngioma<br />- plexus papilloma<br />- glioma<br />- oligodendroglioma<br />- glioblastoma<br />- meningioma<br />- neurinoma<br />- metastases<br />- haemangioblastoma<br /><br /><strong><span style="font-size:130%;">Vascular</span></strong><br />-arteriovenous malformation (AVM)<br />- aneurysm<br />- infarction<br />- ischaemia </p><p><strong><span style="font-size:130%;">Infectious </span></strong><br />- encephalitis<br />- abscess<br />- meningitis<br />- tuberculosis<br /><strong><span style="font-size:130%;">Degenerative </span></strong><br />- cerebral atrophy<br />- hydrocephalus<br />- multiple sclerosis</p><p><strong><span style="font-size:130%;">Trauma </span></strong><br />- fracture<br />- cerebral contusion<br />- pneumatocele </p><p><strong>H<span style="font-size:130%;">aemorrhage</span></strong><br />- extradural<br />- subarachnoid<br />- subdural (acute/chronic)<br />- extradural<br />- petechial<br />- parenchymal </p><p><strong><span style="font-size:130%;">Other</span></strong><br />- subarachnoid cysts<br />- subdural hygroma </p><p><br /><strong><span style="font-size:130%;">Indications</span></strong> </p><p>- Headache<br />- transient ischaemic attack<br />- dementia screen<br />- cerebrovascular attack<br />- MRI contraindicated/ not available </p><p align="center"><br /><strong><span style="font-size:180%;">Criteria</span></strong></p><p align="left"><br /><strong><span style="font-size:130%;">Visualisation imaging criteria</span></strong><br />- whole cerebrum<br />- whole cerebellum<br />- whole skull base<br />- vessels after the introduction of IV contrast media </p><p align="left"><br /><strong><span style="font-size:130%;">Image reproduction criteria</span></strong><br /> - sharp reproduction of the border between grey and white<br /> matter<br />- sharp reproduction of the basal ganglia<br />- sharp reproduction of the ventricular system<br />- sharp reproduction of the cerebrospinal fluid space<br /> around the mesencephalon<br />- sharp reproduction of the cerebrospinal fluid space over<br /> the brain<br />- sharp reproduction of the great vessels and the choroid<br /> plexuses after the introduction of IV contrast media</p><p align="left"><strong><span style="font-size:130%;">Anatomy covered</span></strong> </p><p align="left"> - from the foramen magnum to the skull vertex </p><p align="left"><br /><strong><span style="font-size:130%;">Gantry scan plane</span></strong> <br />- 10-12 degrees above the orbito-meatal (OM) line to reduce<br /> dose to the lenses of the eye (refer figure 4) </p><p align="center"><br /><strong><span style="font-size:130%;">Sequence Technic</span></strong> </p><p align="left">A sequence brain protocol can be useful for patients that are unable to keep still. Generally it is a lot easier and quicker to repeat a single scan slice, rather that the entire spiral/helical range. If the patient is really uncooperative a sequence scan with the fastest tube rotation time possible should be used</p><p align="center"><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /></p><p></p><p><br /></p><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/1528462918761068348-7770922352833446210?l=radiologynet-head-ct.blogspot.com' alt='' /></div>Agen Propolisnoreply@blogger.com0